Never heard anyone use megameters either. They either stay on kilometer, or switch to miles. And miles mean different things from one place to the next.
Megameters are somewhat common in astronomy, for example when describing low orbital hights.
Really? I would have though that they would use the scientific notation in meters, so that the numbers are explicitly clear.
Never seen that for a distance, interesting thought.
Huh? Why would you switch to miles from kilometers?
And IMHO megameters aren’t used that often because there is rarely anything useful to measure with it. Using a different unit makes you lose your sense of scale (e.g. the earth has a radius of ~7000km, not 7Mm) and for astronomy megameters aren’t big enough most of the time (and you might as well use lightseconds/years because gigameters give no real intuition of scale).
